netwoek over powerline is a bit hit or miss. my house was a miss for two such products. and i hear that works best for outlets on the same wire run, it sounds like the signal is lost if you go from one run, through the breaker box and out a different run. might be my problem here, or the not so great electrician that iwned this place before us did something screwy. i am saving up to have an electrician come and audit the place after we found a couple things are not what he told us, such as a couple gfci slave labeled outlets in the kitchsn do not actually get controlled by the nearby real gfci "masters".

agter those, i tried some wifi repeaters, which have ethernet ports on them as well to also act as an ethernet/wifi bridge. that sortof works, depending on your need. I could surf web and check emails ok that way, but my work stuff requires shorter latency that this setup provides and i had frequent disruptive disconnects from work servers a few thousand miles away. if you dont worry about latency then this might be anothrr option for you.

What i need is to run ethernet from the wan router to my office, then i should be ok.

Another option is to get wlan Access point and use it as a bridge. But that might have some problems, debending for a model. D-Link Access points shoot all other devices down here. Ended upto use Buffalo Access point.

You can find pretty cheap rj45 ethernet -> wifi adapters on Ebay etc.Just plug it into a USB port for power and into the ethernet port and use your regular nic.

I have one, i have still not used it much so can't recomend it yet but i'm pretty sure it will be okay for my usage when i need it (my pegasos2 is also moving to a location where i don't want to use wired ethernet)